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參數(shù)資料
| 型號： | SAA7712 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Sound effects DSP |
| 中文描述： | DSP的音效 |
| 文件頁數(shù)： | 22/44頁 |
| 文件大小： | 178K |
| 代理商： | SAA7712 |
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1999 Aug 05
22
Philips Semiconductors
Preliminary specification
Sound effects DSP
SAA7712H
8.6.4
S
TART AND STOP CONDITIONS
Both data and clock lines will remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line, while
the clock is HIGH, is defined as a START condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH
is defined as a STOP condition (P) (see Fig.12).
Fig.12 START and STOP conditions.
handbook, full pagewidth
MGS217
SDA
SCL
S
P
START condition
STOP condition
8.6.5
D
ATA TRANSFER
A device generating a message is a ‘transmitter’ and a device receiving a message is the ‘receiver’. The device that
controls the message is the ‘master’ and the devices which are controlled by the master are the ‘slaves’.
Fig.13 Data transfer on the I
2
C-bus.
handbook, full pagewidth
MGS218
SDA
SCL
S
START condition
1
2
7
8
9
1
2
3 to 8
9
MSB
ACK
ACK
acknowledgement
signal from receiver
byte complete
interrupt within receiver
clock line held LOW while
interrupts are serviced
acknowledgement
signal from receiver
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